How does overhead works

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Alfred

How does overhead works? I needed this answer like yesterday. Is anyone able to help me with this?

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Juli

"An overhead works by projecting light through a glass plate..."

An overhead works by projecting light through a glass plate. You write on a clear plastic sheet which sits on the glass plate. The image is focused by concave magnifying glass and then reflected in a 45 degree mirror used to reflect the image onto a white screen. Because of the mirror the image is flipped which makes this medium ideal for teaching because you end up facing the class while writing.

Q. Which works best for painting, artograph projector or an overhead type projector. ?
i am considering a projector to enlarge photos that i will pencil in and then paint later. i will enlarge from say about 4x5 to say about 15 by 22 inches at the largest. one review in epinions slammed the artograph projector and said an overhead worked much better. i'd like to hear from artists that have used the autograph prism or super prism for enlarging photos.

"The problem with the overhead projector is that they are designed to project transparencies..."

The problem with the overhead projector is that they are designed to project transparencies, where the artgraph will project an ordinary, opaque photograph. So, if you plan to use and overhead projector, you will have to find a way, and take the extra steps to convert the photo into a transparency.

Q. Where can i find a cheap overhead projector that works good?

ebay

Q. How well does the military press (overhead press) work the chest?
i need a lot of work on my chest and the back of my shoulders... and the military press works both of those, plus triceps, but how well does it work the chest?

"It works the chest alright but i would..."

it works the chest alright but i would recoment getting a set of weights and doing upright rows and dumbell flys. i would also do pressups.

Q. What will make conservatives see that lower overhead does not get passed onto working americans?
conservatives insist employers will hire more than they need, pay more than labor is worth and pass savings directly onto consumers if their overhead is lower or their profit margins are broader. what will it take conservatives to understand that's not the way it actually works?

No conservatives have ever said "employers will hire more than they need, pay more than labor is worth" Not sure where you got that info. Perhaps you should learn some economics. All costs are ultimately paid by individuals, either by raising a price, cutting a worker, or cutting stock holder dividends. Usually some combination take place. Conversely, any savings in cost will be passed on to individuals through the same methods. Usually as lower price first to gain market share, hire more workers to expand then dividends to stock holders.

Q. How do overhead calculators work?
i'm sitting in maths class one day, when my teacher whips out this huge overhead calculator. the screen is obviously see-through, but the numbers stull appear on it. how do the mechanics of this differ from a normal calculator?

nothing difference just place the project on the screen of result

Q. How do the overhead sensors work that are on freeways (in ca) near public scales. are they magnetic or what?
there are perpendicular modules on poles that hang over the traffic lanes as you get near the scales and then a large parallel one right alongside the scales in the right traffic lane. what/how are they sensing? they seem to be sensing loads or vehicle weight, but they are overhead. what technology do they use?

those things over hed you speak of are for a nation wide system call Prepass it is for trucks ( 18 wheelers) there are sensors in the road that weight the truck and in the cab there is a little black box that tells the driver weather or not to pull in to a weight station it is like the same thing you can get for a toll road so you dont have to go to the booth and the dont sense the load just for weight and the companys safty record if you are over loaded the little box has a red light on it and a voice will tell you to pull in to the scale hope that anwsers your question

Q. Does anyone know where i could find an overhead projector for free?
i am looking for a working overhead projector for free! if anyone knows where i could get one for free- except for on ebay or craigslist, please respond! thanks again =]

The Salvation Army, good luck !

Q. Is exposed insulation dangerous to have overhead at work in an enclosed store?
the back stockroom at my place of employment has exposed insulation on the ceiling. it is like the pink panther but yellow. it is a "small" store, the backroom is probably 800 sq.ft. ceiling is 15' high. i don't want to breath it in everyday. should i say something?

It should not present any problems to you. It does not usually contain anything nasty like asbestos so personally I wouldn't worry.

Q. How does a overhead projector work?
apparently it needs a concave mirror, condenser lenses, the slide or film, the projection lens, then the screen. thanks a lot

its not a 'film' its called a transparency and the image reflects off the mirror onto the screen with is usually a white screen or a white wall. and it needs a lightbulb .

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